﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo01
{
    class Shape
    {
        private int sideLen;

        public Shape(int sideLen) {
            this.sideLen = sideLen;
        }
        public void GetArea() {
            
        }

    }
}
